"Our new observations with HARPS mean that about 40 percent of all red dwarf stars have a super-Earth orbiting in the habitable zone where liquid water can exist on the surface of the planet," team leader Xavier Bonfils of the Observatoire des Sciences de l'Univers de Grenoble in France said in a statement. "Because red dwarfs are so common — there are about 160 billion of them in the Milky Way — this leads us to the astonishing result that there are tens of billions of these planets in our galaxy alone."

Planets in tight orbits around stars that get ejected from our galaxy may actually themselves be tossed out of the Milky Way at blisteringly fast speeds of up to 30 million miles per hour, or a fraction of the speed of light, a new study finds.

"These warp-speed planets would be some of the fastest objects in the galaxy, aside from photons and particles like cosmic rays," said Avi Loeb, an astrophysicist at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass. "In terms of large, solid objects, they would be the fastest. It would take them 10 seconds or so to cross the diameter of the Earth."

It was a slender bird, with long wings and a spear-like bill to catch swift ocean prey. And scientists say the first glimpse of the extinct giant penguin species was worth the 26 million-year wait.

Experts from New Zealand and the United States reconstructed a fossil skeleton of one of the giant sea birds to reveal a body shape unique from known penguin species with features that have them describing it as one elegant bird.

Six months before the space shuttle Challenger exploded over Florida on Jan. 28, 1986, Roger Boisjoly wrote a portentous memo. He warned that if the weather was too cold, seals connecting sections of the shuttle’s huge rocket boosters could fail.

“The result could be a catastrophe of the highest order, loss of human life,” he wrote.

Astronomers have detected a rocky "super-Earth" planet orbiting a nearby star in a region where life could possibly exist, a finding that led one of the team from UC Santa Cruz to predict there must be billions more of them in the Milky Way.

"Detecting this planet so near implies that our galaxy must be teeming with billions of potentially habitable rocky planets," said Steven Vogt, a veteran UC Santa Cruz planet hunter who is a member of the discovery team and is now completing a new telescope called the Automated Planet Finder at the Lick Observatory atop Mount Hamilton near San Jose.

Imagine you could step out of our Milky Way a few million light-years and take a look back. This is the sort of view you might see. That is because this dazzling new image from the Hubble Space Telescope is of a galaxy that is thought to resemble our own.

Known as NGC 1073, and lying 55 million light-years away in the constellation of Cetus, it is a spiral galaxy, like so many classic “star cities”, but has a distinctive bar across its middle. This bar apparently denotes a galaxy that has moved on from being a bright young thing and headed into middle age.